Funky vent pipe

Our vent pipe exits through the roof as it should. But where it passes through the attic floor there is a 6inch round opening on the side. some one stuffed rags in it long before we bought the house. over time the rags have fallen out. Should i seal it up? what is this hole?

Advertisement

Funky vent pipe

Really need pictures showing what you are talking about. As for sealing, yes, due to it causes Chimney effect, along with it is also a easy way for fire to spread up into the attic, if one should happen.

Funky vent pipe

Funky vent pipe

I think what Greg is saying is that by having that hole open, it is pulling in fresh air through the attic vents, and for a fire to really get rolling in your attic, you need lots of fresh air. Which you now have because those rags are gone. restuff the hole, at a bare minimum, you could be exposing the attic area to dangerous methane style gasses from your septic system.

__________________
Pardon any typos, my IPad has a mind of it's own for spelling corrections!